NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 17t Silver rear-derailleur-mount-type_shimano-rear-direct-mount It is water resistant and

It is water resistant and made to last

spoke:14/15/14g

Efficient SPD step-in design on one side with a flat platform on the other

Clearance for 26 x 2

Shaft Type: Threaded

NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 17t Silver rear-derailleur-mount-type_shimano-rear-direct-mount It is water resistant andSurly track cogs are threaded the same as a BMX freewheel (1. 375 x 24 tpi right hand threads). This means that they will fit on single speed rear hubs, as well as BMX freewheel hubs, but this application is not recommended. Track cogs are meant to work on track hubs only. 415 hardened chromoly steel 1. 375" x 24 tpi Photo for color and material reference only Tooth Count: 17